Since dedicated DMA Controllers such as the Intel 8237 are obsolete and are no longer being manufactured, I propose to build one from CMOS glue logic. I know that there are quite a few left that can be bought however, I thought that I would attempt to build one. Could an effective and simple DMA Controller be built with NAND gates and octal bus transceivers?

Since dedicated DMA Controllers such as the Intel 8237 are obsolete and are no longer being manufactured, I propose to build one from CMOS glue logic. I know that there are quite a few left that can be bought however, I thought that I would attempt to build one. Could an effective and simple DMA Controller be built with NAND gates and octal bus transceivers?

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No -- not a practical one. You'd have a great deal more luck with an FPGA. I'll bet there is even an 8237 macro you could use